<SEC-DOCUMENT>0001209191-19-036417.txt : 20190612
<SEC-HEADER>0001209191-19-036417.hdr.sgml : 20190612
<ACCEPTANCE-DATETIME>20190612165444
ACCESSION NUMBER:		0001209191-19-036417
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20190610
FILED AS OF DATE:		20190612
DATE AS OF CHANGE:		20190612

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			PYLE MICHAEL R
		CENTRAL INDEX KEY:			0001222579

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-11859
		FILM NUMBER:		19894110

	MAIL ADDRESS:	
		STREET 1:		C/O PEGASYSTEMS INC
		STREET 2:		101 MAIN STREET
		CITY:			CAMBRIGE
		STATE:			MA
		ZIP:			02142

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PEGASYSTEMS INC
		CENTRAL INDEX KEY:			0001013857
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMPUTER PROCESSING & DATA PREPARATION [7374]
		IRS NUMBER:				042787865
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		ONE ROGERS STREET
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142-1209
		BUSINESS PHONE:		6173749600

	MAIL ADDRESS:	
		STREET 1:		ONE ROGERS STREET
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142-1209
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
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    <schemaVersion>X0306</schemaVersion>

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    <periodOfReport>2019-06-10</periodOfReport>

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    <issuer>
        <issuerCik>0001013857</issuerCik>
        <issuerName>PEGASYSTEMS INC</issuerName>
        <issuerTradingSymbol>PEGA</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001222579</rptOwnerCik>
            <rptOwnerName>PYLE MICHAEL R</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O PEGASYSTEMS INC.</rptOwnerStreet1>
            <rptOwnerStreet2>1 ROGERS STREET</rptOwnerStreet2>
            <rptOwnerCity>CAMBRIDGE</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02142</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Senior VP, Engineering</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
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            <transactionDate>
                <value>2019-06-10</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
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                <transactionCode>M</transactionCode>
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                <value></value>
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            <transactionAmounts>
                <transactionShares>
                    <value>402</value>
                    <footnoteId id="F1"/>
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                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
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                <sharesOwnedFollowingTransaction>
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                <value></value>
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                    <value>179</value>
                </transactionShares>
                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
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            <transactionCoding>
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            <transactionTimeliness>
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            <transactionAmounts>
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                    <footnoteId id="F2"/>
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                <transactionPricePerShare>
                    <value>71.72</value>
                    <footnoteId id="F3"/>
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                <sharesOwnedFollowingTransaction>
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                    <footnoteId id="F2"/>
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                    <footnoteId id="F4"/>
                </transactionPricePerShare>
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                    <value>D</value>
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                <sharesOwnedFollowingTransaction>
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        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2019-06-10</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1000</value>
                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>70.95</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
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                <sharesOwnedFollowingTransaction>
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                    <footnoteId id="F5"/>
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                    <value>D</value>
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        </nonDerivativeTransaction>
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    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Stock Units</value>
                <footnoteId id="F6"/>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0.00</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2019-06-10</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
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                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>402</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2017-03-09</value>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F7"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>402</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2812</value>
                </sharesOwnedFollowingTransaction>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
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        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Represents 5% vesting on June 9, 2019, with a release date of June 10, 2019, the first business day following the vesting. The original grant was 8,033 restricted stock units, with 20% vesting on March 9, 2017, and the remaining 80% vesting in equal quarterly installments over the remaining four years.</footnote>
        <footnote id="F2">Sold pursuant to a pre-arranged stock trading plan under rule 10b5-1 of the Securities Exchange Act of 1934, as amended.</footnote>
        <footnote id="F3">Represents the weighted average of the sale prices on June 10, 2019, ranging from $71.03 to $72.01. The individual has provided the Company, and undertakes to provide to the staff of the Securities and Exchange Commission or any security holder of the Company, upon request, full information regarding the number of shares sold at each separate price.</footnote>
        <footnote id="F4">Represents the weighted average of the sale prices on June 10, 2019, ranging from $72.03 to $72.20. The individual has provided the Company, and undertakes to provide to the staff of the Securities and Exchange Commission or any security holder of the Company, upon request, full information regarding the number of shares sold at each separate price.</footnote>
        <footnote id="F5">Does not include shares of common stock subject to unvested restricted stock units and/or options awards.</footnote>
        <footnote id="F6">Each restricted stock unit represents the right to receive, following vesting, one share of the issuer's common stock.</footnote>
        <footnote id="F7">Once vested, the shares of common stock are not subject to expiration.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Janet Mesrobian, Esq., Attorney-in-Fact for Michael R. Pyle</signatureName>
        <signatureDate>2019-06-12</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
